QRA
PRE-CONSULTATION Reference Number:
FORM
Instructions:
a. All forms are to be duly completed upon submission to MHD at Contact_MHD@mom.gov.sg
b. Applications are to be submitted together with the following relevant documents:
Form A (for enquiry on transportation Quantitative Risk Assessment) or
Form B (for enquiry on fixed Installation Quantitative Risk Assessment) or
Form C (for enquiry on pipeline Quantitative Risk Assessment)
Site layout plan showing location of the proposed activities and the hazardous material(s)
Safety Datasheets (SDS)
DETAILS
1. Company Name, UEN and Address:
2. Name of Contact Person:
3. Email Address:
4. Telephone Number: 5. Fax Number:
6. Proposed Activities and/or Facilities:
_________________________________ ______________________ ________________
Name of Applicant in BLOCK LETTERS Signature of Applicant Date
Please indicate the intention of this pre-consultation and list all the queries, if any.
Form A (for enquiry on transportation Quantitative Risk Assessment)
1. Fill up the table below, indicating the proposed chemicals to be transported. Kindly highlight any proposed chemicals already being transported in
different quantities or/and routes.
Transport Max Quantity Total
Physical State Unit Capacity of
Material Hazard GHS 30min Flashpoint in Bulk Transported per Number of
(Solid/Liquid/ Container To2 From
Name Class Classification1 AEGL-3 (°C) Tank Trip Trips per
Gas) (kg/litres/tonnes)
(Yes/No) (kg/litres/tonnes) Year
1
For toxic chemicals, please provide acute toxicity (inhalation) category.
2
To attach map(s) indicating the proposed transport route(s) and timing(s).
Form B (for enquiry on fixed installation Quantitative Risk Assessment)
1. Is this an expansion or a change of an existing plant? (Yes/No)
2. If yes, has QRA been done for existing plant? (Yes/No) 3
3. Fill up the table below, indicating ALL (including new and existing4) chemicals being processed.
Physical Storage Existing New Max Max
Material Hazard GHS 30min Flashpoint
State Max Quantity Max Quantity Pressure Temperature Comment
Name Class Classification5 AEGL-3 (°C)
(Solid/Liquid/Gas) (kg/litres/tonnes) (kg/litres/tonnes) (Barg) (°C)
3
If Yes, to attach a copy of QRA no-objection letter(s).
4
Applicable only for existing plant. Kindly highlight any existing chemicals already being stored and handled on site under the “Comment” column.
5
For toxic chemicals, please provide acute toxicity (inhalation) category.
Form C (for enquiry on pipeline Quantitative Risk Assessment)
1. Is this a change of an existing pipeline or an extension/branching from an existing pipeline? (Yes/No)
If yes, has QRA been done for existing pipeline? (Yes/No) 6
Above
Max Max Diameter
Material Physical State Hazard GHS 30min Flashpoint Length of ground (A),
Pressure Flowrate of Pipeline To8 From
Name (Liquid/Gas) Class Classification7 AEGL-3 (°C) Pipeline (m) Under
(Barg) (kg/s, L/s) (m)
Ground (U)
6
If Yes, to attach a copy of QRA no-objection letter(s).
7
For toxic chemicals, please provide acute toxicity (inhalation) category.
8
To attach map(s) indicating the proposed pipeline route(s).
(Optional) Worst case scenarios harm distances (check relevant boxes below and indicate the WCS
harm distances):
Thermal radiation distance
☐ Pool Fire _________ m
to 4 kW/m2:
Thermal radiation distance
☐ Jet Fire _________ m
to 4 kW/m2:
Thermal radiation distance
☐ BLEVE / Fireball _________ m
to 4 kW/m2:
Overpressure distance at
_________ m
1psi:
☐ Flash Fire Distance to LFL: _________ m
Overpressure distance at
☐ Vapor Cloud Explosion _________ m
1psi:
Overpressure distance at
☐ Pressure Vessel Burst _________ m
1psi:
Toxic dispersion distance
☐ Toxic Release _________ m
to 30min AEGL-3:
List any other information9 that may facilitate the pre-consultation
For Existing Sites Undergoing Change/Expansion – involving transition into
2016 QRA Guidelines
9
E.g. marked up plot plan, layout or other drawings with indication of changed portion and scope, SDS of new
chemicals, preliminary QRA report and project timeline.
Definitions for Types of Sites:
“Existing” sites – Existing brownfield sites
“Change” sites – Changes made to existing brownfield sites occurring after the 2016 QRA Guidelines
were implemented. Such changes may be due to plant expansion, modifications and Addition & Alteration
(A&A) works.
Notes:
1) A single operator’s Installation may consist of one or more types of sites as listed above, i.e.
Existing site(s) and/or Change site(s).
2) For sites that are wholly greenfield sites consisting of new projects occurring after the 2016
QRA Guidelines are implemented, QRA criteria and requirements as indicated in the 2016 QRA
Guidelines shall apply.
Definition for “Full-Site QRA”:
“Full-Site QRA” – A full-site QRA is a QRA that considers all risks within the contiguous land plot
leased to a single commercial entity operating the Installation. This QRA will produce risk results
representing the full site’s risk profile (a sum of risks from Existing sites and Change sites where
applicable)
Site-specific Considerations:
For sites consisting of Existing sites, any change, e.g. due to expansion / modification / A&A works, that
requires a QRA will need to conduct a Full-Site QRA as indicated in the 2016 QRA Guidelines. However,
in reviewing the QRA for such sites, Agencies will have the following additional considerations:
1. The Change sites will be required to adopt the detailed QRA methodology as indicated in the 2016
QRA Guidelines. As for Existing sites, simplified QRA approaches may be considered, including:
Representative major accident scenarios selected for the QRA may be defined and
justified. Reference may be made to Process Hazard Analysis (PHA) and/or top risk
contributors identified from past QRAs.
Any other QRA approaches and/or scenario selection methods if used, shall be justified
accordingly.
2. Risk Contours generated from the Full-Site QRA will be referred to by Agencies in checking for
compliance against QRA criteria as stipulated in the 2016 QRA Guidelines.
3. In view of case-specific circumstances that may be encountered in the compliance of Full-Site
QRA risk contours with QRA criteria, the following may be considered subject to pre-consultation
with MHD:
Failure to comply with QRA criteria – Agencies will consider the requirement for ALARP
demonstration if criteria could not be met due to risk contributors from Existing sites. If
criteria could not be met due to risk contributors from Change sites, then risks are to be
reduced until the criteria are met.
